Derrick-car.



C. VOLKMANN.

DERRICK CAR.

APPLICATION'HLED MAR. 20. 1914.

1,216,1& Patented Feb. 13, 1917.

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C. VOLKMANN.

DERRICK CAR.

APPLICATION FILED MAR. 20. 1914.

1m 6 188 A Patented Feb.13,1917.

4 SHEETSSHEET 2.

Inventor "WM/mews C. VOLKMANN.

DERRICK CAR.

APPLICATION FILED MAR. 20. 1914.

1,816,188. Patented Feb. 13,1917.

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C. VOLKMANN.

DERRICK CAR.

APPLICATION FILED MAR. 20. 1914.

Patented Feb. 13, 1917.

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CHARLES VOLKMANN, OF CHICAGO, ILLINOIS.

DERBICK- CAR.

Specification of Letters Patent.

Patented Feb. 13, 1217.

Application filed March 20, 1914. Serial No. 825,978.

To all whom it may concern:

Be it known that I, CHARLES VOLKMANN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Derrick-Cars, of which the following is a specification. I

My invention relates to that class of cars which are designed to carry a mast and derrick boom for the purpose of picking up and moving heavy materials, and it is important in a car of this kind to get the top of the mast low enough so that it will clear viaducts under which the car must pass.

Cars of this type with which I am familiar, usually have the mast secured to the floor of the car body which is objectionable due to the fact that it raises the mast considerably, and since the height is limited by viaducts, etc., under which the car must pass, it necessarily follows that the leverage of these relatively short masts is clearly restricted.

My invention has for its object to provide a structure which will permit of the use of a mast of the same dimensions, but which is to be materially longer than is possible where it is carried by the floor of the car itself, and a further object of my invention is to widen the distance between the lateral supports of the mast, at their lower ends thus increasing the resistance of the mast to tipping.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings which are hereunto annexed and are a part of this specification, in which:

Figure 1, is a side elevation of the car constructed in accordance with my invention, the end of the boom being broken away.

Fig. 2, is a fragmentary detail view showing the end of the boom together with the lifting tackle.

Fig. 3, is a rear end elevation of the car.

Fig. 4, is an end elevation partly in section of the bottom of the mast and boom.

Fig. 5 is a sectional view of the mast.

Fig. 6, is a side elevation partly in section showing the manner of securing the lower end of the mast in position and the manner of mounting the plates which furnish the mounting for the lower end of the boom.

v rear axle.

Fig. 8, is a fragmentary detail view of the detachable coupling.

Fig. 9, is a top or plan view of the car.

Fig. 10, is a detail view of the bottom of the stiff leg.

Fig. 11, is a detail view partly in section of the goose neck connection at the top of the stiff leg.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings, my car con sists of front and rear trucks 1 and 2, and built-up girders, 3 and 4:. These girders rest upon and are secured to a plate 5, which rests upon a plurality of plates 6, which are secured to the axle by means of U-shaped bolts, 7 and 8, which pass through a lower plate 9, nuts 10 and 11, serving to connect the plates rigidlyto the axle.

All of these plates are provided with a central opening in which a king pin or pivot 12, is secured, the lower end of which is provided with a washer 13, which is secured in place by means of a pin 14-. The pin 12, is provided with a head 15 in which is mounted a shaft 16 to which is secured the lower end of the boom 17. An antifriction bearing 18, is mounted intermediate the plate 5, and the head 15 of the pin 12, to lessen the frictional resistance to the swinging of the boom.

The axles of the forward truck 2 are extended beyond the wheels 19 and 20, and are connected by means of yokes 21 and 22. These yokes are provided with upwardly extending projections 23 and 24.

The mast, as more clearly seen in Figs. 1, 5 and 9, is formed in the shape of an inverted U, having cross braces and supports connecting the respective legs of the mast 27 to strengthen and stiffen the mast. The lower ends of the legs are pivotally attached by means of pins or pivots 25 and 26, to the upwardly extending projections 23 and 24, respectively, thus providing a greater distance between the lower ends of the legs than can be obtained where they are secured to the body of the car.

The outer end of the boom 17 ,is provided with the usual hoisting tackle 28, the cables of which pass over the sheaves 29 and 30 mounted in the top of the mast. These sheaves are carried in a frame which is pivotally secured to the top 31 of the mast 27, by means of a pivot 32, and to a crossmember 33, by means of a pivot 3%, thus permitting it to adjust itself to the swinging of the boom.

A block 35, of the usual construction is secured to the head 36 of the pivot 32. The stifi' legs 37, and 38, are detachably secured by goose necks 39, to a plate 4L0, which is secured to the top of the mast 27. The lower ends of the stiff legs are secured to the builtup girders 3 and l, adjacent the rear truck 1, as clearly seen in Fig. 10. A detent 40 is provided to hold them fixedly in position until it is desired to fold them down when the mast and boom are being laid fiat during transportation.

The rear trucks are provided with a housing 41, inside of which is mounted a boiler 42 and engine 43, hoisting tackle ll, of the usual construction being shown.

One axle 45, of the rear truck 1, as shown, is provided With a sprocket wheel 46, so that when desired, the car may be driven by a chain and sprocket driven by the engine 43, so as to enable the car to be self-propelled when necessary.

The couplings 4:7, as shown in Fig. 8, are detachably secured to the ends of the builtup girders 3 and el, by means of bolts l8 and L9, or by any other suitable or convenient form of fastening. This enables the removal of the coupler when the hoisting apparatus is in use, and it is found to be of great convenience many times to be able to thus remove it.

Having described my invention what I regard as new and desire to obtain by Letters Patent is:

1. A derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of said plates, a plate intermediate the fixed plates and the head of the pivot, built-up girders secured to said plate, a mast formed of metal the ends of which are secured to the ends of the axles, hinges in the sides of said mast, a boom secured to said pivot, and hoisting tackle secured to the top of the mast and the end of the boom.

2. A derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of said plates, a plate intermediate the fixed plates and the head of the pivot, built-up girders secured to said plate, a mast formed of metal the ends of which are secured to the ends of the axles, hinges in the sides of said mast, a boom secured to said pivot, hoisting tackle secured to the top of the mast and the end of the boom, and stiff legs one end of which is detachably secured to the top of the mast and the other end, pivotally secured to the girders adjacent the rear trucks.

3. A derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of saidplates, a plate intermediate the fixed plates and the head of the pivot, builtup girders secured to said plate, a mast formed of metal the ends of which are secured to the end of the axles, hinges in the sides of said mast, a boom secured to said pivot, hoisting tackle secured to the top of the mast and the end of the boom, 'stifi" legs one end of which is detachably secured to the top of the mast and the other end pivotally secured to the girders adjacent the rear trucks, and power driven means to operate said tackle.

4. A derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of said plates, a plate intermediate the fixed plates and the head of the pivot, an anti-friction bearing intermediate the said plate and the head of the pivot, built-up girders secured to said plate and to the rear truck, a mast formed of metal the ends of which are secured to the ends of the axles, hinges in the sides of said mast, a boom secured to said pivot, hoisting tackles secured to the top of the mast and theend of the boom, and power driven means to operate said tackle.

5. A- derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of said plates, a plate intermediate the fixed plates and the head of the pivot,

built-up girders secured to said plate, yokes secured to the ends of the axles having upwardly extendingprojeotions, an inverted U-shaped mast the ends of which are pivotally secured to said projections, still legs one end of which is pivotally secured to the girders adjacentthe rear truck, a boom secured to said pivot, hoisting tackles secured to the top of the mast and the end of the boom, and power driven means to operate said tackle. v

6. A derrick car having front and rear trucks, a plurality of horizontal metal plates secured directly to the axles of the front truck, a pivot which passes through the center of said plates, a plate intermediate the fixed plates and the head of the pivot, built-up girders secured to said plate, yokes secured to the ends of the axles having upwardly extending projections, an inverted U-shaped mast the ends of which are pivotally secured to said projections, a plurality of cross braces and supports connecting the legs of the mast, stifi' legs one end of which is pivotally secured to the girders adjacent the rear truck, a boom secured to said pivot, hoisting tackles secured to the ing the boom to the axles of the front truck,

an inverted U-shaped mast having its lower ends pivotally secured to the ends of the axles, a cross member supported between the side members of the mast adjacent the upper end thereof, a frame pivotally sup ported between the upper end of the mast and cross member, sheaves supported within the frame, and means passing over the sheaves and connected to the free end of the boom, whereby said frame is moved simultaneously with the boom.

8. In a derrick car, front and rear trucks, a mast comprising an inverted U-shaped member, means for pivotally connecting the lower ends of said mast to the axles of the front truck, a cross member supported between the side members of the mast adjacent the upper end thereof, a frame supported between the cross member and upper end of the mast, a pivot pin extending through the upper end of the mast and frame, and a pivot pin extending through the lower end of the frame and cross member, whereby the frame may adjust itself in a horizontal plane, and sheaves supported by the frame.

In testimony whereof, I have signed the foregoing specification.

CHARLES VOLKMANN. Witnesses:

VICTORIA A. LINDSTROM, C. M. BAUMEISTER.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. (1. 

